1201121102011 has 4 divisors (see below), whose sum is σ = 1201168495792. Its totient is φ = 1201073708232.

The previous prime is 1201121101997. The next prime is 1201121102023. The reversal of 1201121102011 is 1102011211021.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1201121102011 - 2¹⁵ = 1201121069243 is a prime.

It is a super-2 number, since 2×1201121102011² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1201121101982 and 1201121102000.

It is not an unprimeable number, because it can be changed into a prime (1201121102081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23658855 + ... + 23709568.

It is an arithmetic number, because the mean of its divisors is an integer number (300292123948).

Almost surely, 2^{1201121102011} is an apocalyptic number.

1201121102011 is a deficient number, since it is larger than the sum of its proper divisors (47393781).

1201121102011 is an equidigital number, since it uses as much as digits as its factorization.

1201121102011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47393780.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 1201121102011 its reverse (1102011211021), we get a palindrome (2303132313032).

The spelling of 1201121102011 in words is "one trillion, two hundred one billion, one hundred twenty-one million, one hundred two thousand, eleven".